A) Describe the research findings on twin and adoption studies looking at personality.
B) What do these findings tell us about how genetics influence personality?

A) Research with identical twins provides insight into the role of genetics in personality.Numerous studies have shown that identical twins are more similar than nonidentical twins in personality traits described by the five-factor theory.Twins raised apart are often as similar as,or even more similar than,twins raised together.Identical twins become more alike as they grow older.Siblings and fraternal twins do not become more alike.Two children who are not biologically related but raised as siblings in the same household tend to be no more alike in personality than any two strangers randomly pulled off the street.Also,the personalities of adopted children bear no significant relationship to those of their adoptive parents.
B) This evidence suggests that parenting style has much less impact than has long been assumed and that similarities in personality between biological siblings and between children and their biological parents seem to have some genetic component.